Remote sensed spectral imagery to detect late blight in field tomatoes

被引：75

作者：

Zhang M. ^{[1
]}

Qin Z. ^{[1
]}

Liu X. ^{[1
]}

机构：

[1] Department of Land, Air and Water Resources, University of California, Davis

来源：

Precision Agriculture | 2005年 / 6卷 / 6期

关键词：

Image feature space; Late blight; Near infrared; Plant disease; Remote sensing; Visualization analysis;

D O I：

10.1007/s11119-005-5640-x

中图分类号：

学科分类号：

摘要：

Late blight, caused by the fungal pathogen Phytophthora infestans, is a disease that quickly spreads in tomato fields under suitable weather conditions and can threaten the sustainability of tomato farming in California, USA. This paper explores the applicability of remotely sensed images to detect disease spectral anomalies for precision disease management. We used the indices approach and generated a 5-index image that we used to identify the disease in tomato fields based on information from field-collected spectra and linear combinations of the spectral indices. Field results indicated that we were able to identify five clusters in the image space with small overlaps of a few clusters. Using the identified 5-cluster scheme to classify the tomato field images, we were able to successfully separate the diseased tomatoes from the healthy ones before economic damage was caused. Hence, the method based on a 5-index image may significantly enhance the capability of multispectral remote sensing for disease discrimination at the field level. © 2005 Springer Science+Business Media, Inc.

引用

页码：489 / 508

页数：19

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